Provide yourself with peace of mind that your kiddos will be safe during car travel, and outfit your vehicle with the Diono Radian 3RX Convertible Car Seat. This ultimate car seat will grow with your baby so that you only need to rely on 1 safety seat for up to 10 years of your child's life. Allowing for newborn rear-facing, forward-facing harnesses, and high-back booster mode, your children are safe for years to come. Designed for rear-facing travel for 5 to 50 pounds, you can keep your child safe while the steel bar reduces rebound rotation for extended rear-facing trips. A mechanically engineered, reinforced steel core made from high-strength automotive-grade steel will shield and protect during travel. Built with the famous Radian slim-fit design for a 3-cross option to not compromise child or passenger safety and comfort. Featuring a 1 hand, easy-adjust 12-position headrest, you can be sure the Diono Radian 3RX Slim Fit 3-in-1 Convertible Car Seat will provide ideal safety and comfort for your babies and toddlers.